Arrangement for indicating and recording permanently the maximum demand for electrical energy on any circuit.



W. W. LAGKIE & D. J. STEELE. ARRANGEMENT FOR INDIGATING AND RECORDING PERMANENTLY THE MAXIMUM DEMAND FOR ELECTRICAL ENERGY 0N- ANY GIRGUIT.

APPLICATION FILED JAN. 31, 1908.

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W. W. LAGKIE & D. J. STEELE.

ARRANGEMENT FOR INDIGATING AND RECORDING EEEMANENTL THE MAXIMUM DEMAND EoE ELEGTRIGAL ENERGY ON ANY CIRCUIT.

APPLICATION FILED JAN-31. 190B. 933 ,845 Patented Sept. 14.1909.

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W. W. LAOKIE & D. J. STEELE. ARRANGEMENT EOE INDIGATING AND RECORDING PERMANENTLY THE MAXIMUM DEMAND FOR ELECTRICAL ENERGY ON ANY GIRUUIT.

APPLICATION FILED JAN.31. 1908.

Patented Sept. 14., 1909.

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W. W. LAGKIE 85 D. J. STEELE.

ARRANGEMENT FOR INDIGATING AND RECORDING PERMANENTLY THE MAXIMUM DEMAND FOR ELECTRICAL ENERGY ON ANY GIRGUIT.

A APPLICATION FILED JAN. 31, 1908.

933, 845, v Patented Sept. 14, 1909.

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UNITED srnrns PATENT onricn.

WILLIAM WALKER LACKIE AND DAVID JOHN STEELE, 0F GLASGOW, SCOTLAND.

DEMAND FOR ELECTRICAL ENERGY ON ANY CIRCUIT.

Specification of Letters Patent.

Application filed. January 31, 1908.

Patented Sept. 14:, 1909.

Serial No. 413,634.

To all whom it may concern:

Be it known that we, WILLIAM WALKER LAOKIE and DAVID JOHN STEELE, both of 75 Waterloo street, in the county of the city of Glasgow, Scotland, electrical engineers, have invented certain new and useful Improvements in and Relating to Arrangements for Indicating and Recording Permanently the Maximum Demand for Electrical Energy on any Circuit, of which the following is a specification.

Our invention relates to improved apparatus for the measuring and recording of a current of electricity in a circuit in any pre-. determined period of time so that the maxi mum demand of any circuit may be recorded.

The apparatus consists of a coil through which the circuit to be measured flows with a moving core or plunger attached toa beam to which there is pivoted a wheel which may be in two parts or quadrantal ratchet or ratchets. An arm and weight are sprung on to a separate spindle, so that as the wheel or ratchet is put into gear by action of the coil on the plunger and caused to operate with the mechanism of an electrical meter, the arm and weight are carried farther away from the fulcrum until they reach such a' position as will overcome the pull on the plunger or a cord, one end of which is attached to the wheel and the other to a spring, is wound up and stretching the spring overcomes the piece on the plunger. To obtain the proper time interval the weight and arms. are not allowed to run back to their zero position but the wheel is 'brought back to zero by a small weight or the ratchet by it s" own weight, or by piece of spring or other suitable means.

In order that our invention may be prop-v of Fig. 4. Fig. 6 is an alternative form of Fig. 1 with a time interval arrangement atend and the wheel F at the other.

tached. Fig. 7 is a plan of Fig. 6. Fig. 8 is an alternative form of Fig. 7. Fig. 9 is a plan of Fig. 8.

Referring to Fig. 1, the apparatus consists of a coil A through which the current to be measured flows, with a moving core or plunger B, attached to a beam G, which is pivoted at D. About the center of this beam C a wheel F is pivoted, on a separate spindle an arm and weight E are sprung and when the wheel F is lifted into gear by action of coil A on plunger B, and caused to rotate with the mechanism of an electrical meter the arm and weight E are carried farther away from the fulcrum D, by the P fixed on wheel F, until they reach such a position as will overcome the pull of the plunger-B. To get the proper time interval the weightand arm E are not allowed to run back to their zero position, but the wheel F is brought back to zero by the small weight N and when an increase of current goes through the meter the wheel F has to be wound up from the beginning before it can carry the weight E past its previous position.

Referring to Fig. 2 which is an alternative form of Fig. 1 where the direction of wheel F and weight E is reversed, and the plunger B being mostly of brass having iron piece at top end. This will be easily understood from the drawing without the aid of further description.

Referring to Fig. 3 which is another form of the apparatus where the beam C is pivoted about the center, the plunger B at one wheel F in this case being in two parts, mounted side by side, and indicated by the letters F and F WVhen the wheel F is thrown into gear with the counter mechanism it is rotated and carries with it the wheel F which has also a pointer attached to it. When the wheel F is rotated a cord attached to it is wound up, and the other end of the cord being fixed to a spring E, the spring is stretched until it overcomes the pull of the plunger B, and so causes F V to drop out of gear. The time interval is obtained by the wheel F beingbrought .back to Zero by pull of spring E when dropped out of gear, the wheel F and the pointer H being made to remain in position corresponding to the strength of current. Before The 7 other coil -A.

the wheel F and the pointer can record an increase,; wheel F- has to be rotated from a zero again.

Referring to Figs. 4 and 5 which is another alternative form of the apparatus. In this case the wheel F'is replaced by a quadrantal ratchet F. When beam C is tilted as before, the ratchet F is thrown into gear with pin drive K on counter mechanism. One edge of pin drive K catches a tooth of the ratchet F and rotates it, the pawl L looking the teeth of the'ratchet F asthey pass, at the same time the weight E is being carried away from the dead center till it overcomes pull of plunger B, and F drops out of gear, the pawl L locking the last tooth that passed and keeping the ratchet in a position corresponding to the strength of current passing through the solenoid, the current being recorded'by' pointer on scale as shown. The milled nuts G and G are for balancing purposes andtwo small screws a, a shown near pivot D are adjusted so as to prevent the ratchet F going too deep in gear with K, or from dropping too far out.

Referring to Figs. 6 and 7 which is anotheralternative form of the apparatus and consists of a quadrantal ratchet F, beam, 0, coil A, and plunger B, as before. The pawl L in this case has one end extended to support a plunger B acting in a coil A this coil A being connected in series with the /Vhen current is passed through meter and therefore through coils A and A the plunger B forces the ratchet F into gear with pin drive K, and so causes it to rotate. The plunger B is lifted into center of coil A clear of extended part of pawl L, and allows pawl L to'fall on to ratchet F,and lock each toot-h as it passes. The pointer P is fixed ona separate spindle with a small spring or sprung washer S pressing againstv it so as to make it comparatively stiff to move, (this will be better seen'in Fig. 8). As ratchet F is rotated a small pin H (also seen in Fig. 8) carries the pointer P forward, the weight E being also carried round until it overcomes pull of plunger B, and F drops out of gear, the pointer indicating strength of current on scale as shown. )Vhen current is switchedoff altogether the plunger B is dropped on to extended end of pawl L, lifting other end by action of plunger B, ratchet F gearing with pin drive -K- and pawl L. In thiscase "when F "is out of gear with K it is also out of gear with pawl L, the pawl being pre-; vented from dropping with F by a small wire catching a crosspiece N (shown in Fig.

9). As F is rotated by pin drive K, a small pin H fixed on F, (seen in Fig. 9) catches ratchet F? and carries it forward along with pointer P, which is attached to it, the ratchet F being caught by pawl L as it passes,

when weight E, which is attached to ratchet V F, is carried out-ward, as before, till it-over.-"--- comes pull of plunger B, causing ratchet F todrop out of gear with'K, and alsowith pawl L, and is carried back to zero by spring S, which is fixed on its axis." Theratchet F is held by pawl L and pointer P,"indicating strength of current. hen an increase of current takes place ratchet F 1s wound up from'zero until it catches F and carries it forward to new position, the ratchet F drop ping out and coming back to zero again.

when maximum current is registered. The pointer .P and ratchet F are brought back to zero when required by lifting the pawlL out of gear. In order to vary the speedat will or to give it any definite time'the gear wheelK' can be increased or reduced in size as may be requlred.

Claims.

p 1. In aninstrument of the character de scribed, the combination with an electric meter, ofmeans for indicating the maximum current supply, saidfmeans comprising i a solenoid, a wheel mounted adj acently-thereto and provided with a weightforresisting its rotation, a pivotally-mounted" cross-bar upon which the wheel is rotatably mounted, a magnetic plunger within said solenoid and mounted upon said cross-bar to bring said wheel into engagement with the meter 1 I I by the action of the solenoid and means con nected with the wheel whereby it is thrown out of engagement with the meter. 2. In an instrument of the character described, the combination, with an-felectric meter, of-a solenoid, a beam pi-votally mounted adjacent to said solenoid and carrying a magnetic plunger projecting into the solen-.

beam and adapted to be brought into driven relation with the meter,-means for exerting a gradually augmented pull upon thewheel tending to pull said wheel out ofengagement with'the meter. Q 1

to, a wheel carried by said beam and nor= mally out of engagement with'said meter, a

solenoid, a plunger in said solenoidand carried by said' beam whereby said wheel is adapted to be brought-into engagement with the meter when the solenoid is excited, and

115 oid, a wheel rotatably mountedupon said a weight connected with said wheel in such manner as to have its leverage increased whereby the wheel becomes finally drawn out of engagement with said meter.

4. In an instrument of the character described, the combination with an electric meter, of means for indicating the maximum current supply, said means comprising a solenoid, a curved member movably mounted adjacent to said solenoid and provided with a weight for resisting its movement, a pivotally mounted cross-bar upon which the curved member is mounted, a magnetic Plunger within said solenoid and mounted upon said cross-bar to bring said curved member 15 into engagement with the meter by the action of the solenoid, and means connected with the curved member whereby it is thrown out of engagement with the meter.

In witness whereof we have hereunto set 20 our hands in the presence of two witnesses.

WILLIAM WALKER LACKIE. DAVID JOHN STEELE. Witnesses:

JOHN LIDDLE, JOHN I. LIDDLE. 

